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krok68 [10]
3 years ago
5

7th grade science questions

Biology
1 answer:
Zielflug [23.3K]3 years ago
5 0

Answer:

Bioluminescence is the production and emission of light by a living organism

Explanation:

Bioluminescence occurs through a chemical reaction that produces light energy within an organism's body. For a reaction to occur, a species must contain luciferin, a molecule that, when it reacts with oxygen, produces light. ... Many organisms also produce the catalyst luciferase, which helps to speed up the reaction.

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Which of the following is a biotic factor that could reduce a population of frogs
Feliz [49]

C.

Biotic mean alive, so we can cut off the first 2 easily. Aquatic birds eat frogs, so that one is safe for now. A decrease in something parasitic usually helps the population, so D is out too. The only one left is C.

4 0
3 years ago
The branch of anthropology that is concerned with discovering what makes human beings different from other living organisms and
Kaylis [27]
The correct answer is biological anthropology, or physical anthropology. 
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4 years ago
Write a sientific explanation describing how light ando sound energy help us communicate and share information our daily lives.
Gekata [30.6K]

Answer:  There are many sources of light, but the initial energy for all light sources comes from the sun. Light travels away from its source in straight lines through space as waves of energy. The waves we can detect with our eyes are called visible light. Patterns in the behavior of light are predictable because light moves in waves through space until it comes in contact with an object or material that changes its direction. Light can pass through or bounce off objects. Additionally, different materials can block or absorb light. If an object blocks light, a shadow of the object forms. If the intensity or direction of the light source changes, the appearance of an object’s shadow can change in size, shape, or darkness. Absorbing light energy can cause changes in matter. A common example includes the color of paper or fabric fading as the matter absorbs light over time. Vibrations cause sounds. We can hear when sound waves travel through the air to our ears and cause our eardrums to vibrate. Sound can also travel through other forms of matter, such as liquids and solids.

Explanation:

4 0
3 years ago
How might biodiversity in Area 1 change if the new bird species ate small mammals, lizards, and toads?
zmey [24]

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8 0
3 years ago
1. What are the components of an atom?
Akimi4 [234]

Answer:

Proton, neutron, and electron

Explanation:

3 0
3 years ago
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